AsynchronousFileChannel.open() - is it blocking?

[Alan Bateman]

On 01/03/2012 22:52, Zhong Yu wrote:
> Is open() a potentially blocking action? Apparently so because some
> sanity checking (e.g. existence of the file) requires disk spin. If
> that's the case, it should probably be explicitly documented.
>
> And after open(), are following methods blocking or non-blocking?
>
>      size();
>      truncate();
>
The asynchronous operations defined by AsynchronousFileChannel are read, 
write, and lock. The other methods, including the open method to create 
or open the file, are synchronous and potentially blocking.

-Alan.